There is a new DMF called sys.dm_db_log_info which takes a single int parameter called @DatabaseId.
Below shows the output compared to the older DBCC LOGINFO and it makes vlf info a lot easier to review.
--old way DBCC LOGINFO; --SQL Server 2017 SELECT * FROM sys.dm_db_log_info(DB_ID(DB_NAME()));
Below is an example of viewing multiple database vlf counts.
SELECT a.[name] AS [database_name], COUNT(b.database_id) AS vlfs FROM sys.databases a CROSS APPLY sys.dm_db_log_info(a.database_id) b GROUP BY a.[name];
Futher info can be found here.